# Type of *the* discrete sine transform

When one refers to "the" discrete cosine transform (DCT), it is generally assumed that one means the type II DCT, where the input array $x_k$ ($0 \leq k < N-1$) is even about $k=-1/2$ and $k=N-1/2$.

Is there a similar convention for "the" discrete sine transform? MATLAB defaults to type I, while Mathematica prefers type II. The FFTW docs are silent on the matter.

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